Wrench.



B. BQ CALDWELL;

WRENCH. APPLICATION FILED IBBIJ, 1911. RBNEWBD JULY 11, 1912.

Patented Sept. 17, 1912.

UNITED lseveras PATENT onirica. J

BENJAMIN B. CALDWELL, 0F CULDESAC, ILAHO, ASSIGNOR Ol? ONE-HALF T0WILLIAM B. KELLER, 0F CULDESACQIDAHO.

WRENCH.'

Application' filed February To all 'whom t may concern y ille it knownthat I, BENJAMIN B; CALD- WELL, a citizen of the United States, residing at Clildesac, in the county of Nez Perce and State' of Idaho, haveinvented certain new and useful Improvements in Wrenches, of which thefollowing vis a speciCatiom This invention relates to wrenches of theslidingjaw type and has for its object the provision` of avcomparatively simple and thoroughly etlieient device of this character,the construetion'of which issuch that 'tool. j .I .v -4

A further object is to provide a wrench the movable jaw thereof may bequickly adj usted into engagement with a nutor other .object andsecurely held against-.accidental the operation of thev displacementduring inelndinga shank .ha'ving a movable jaw slidably mountedthereinand provided'with aglever adapted' to grip the shank-andl clampthe-movable jaw 1n engagement after said jaw'has heen moved in contactwith the work.

A further object is'to provide a Wrench,

the movable jaw of which is split longitudinally so as to eompensateforany Wear on the cam surface of the lever.

A still further object of the invention is generally to improvethisclass of devices so as 'to increase theirl utility, durability 'andetiieiency. Y

Further objects 'and advantages will appear in the followingdescription, it being understood that various changes `in form,

propm'tions and minordctails of construction may the `appended claims.

For-a full understanding ofthe invention and the merilsthereof,reference is' to he had tothe following 'description and aceompanyingdrawings, in which:

Figure 1 is a perspective view of a' wrench constructed in'aeeordaneewith my invention, showing themovahle jaw thereof' locked in adjustedposition; Fig. 2 is a side elevation partly in section,- showing thelever releasedl to permitadjustment of the i'novahlejaw; Fig. 3 isa'longittulinal sectional view of Fig. 1 g ,l"ig. 4t is a transversesei-tional .view taken'o'n the line 4f 4 of Fig. I and loolingin thedirei-,tion ot the arrow; Vig. 5 is a transverse sectional View' takenon the line 5 --of ltig. l.. y I

(orres|mnding and-like 'parts are refer-mid .vided therewith be resortedto within .the scopeofto' in the following description` and indisamereference characters.

The improved Wrench forming' the subjectl matter of the presentinvention comprises a longitudinally ,disposed having one end thereofprovided With a disposed. shoulders. 8

to form oppcsitely operating handle.

'for .engagement with an shank 1 5 Specication'of Letters Patent. lPatent-,0d Sept, 1912, 2.5, i911. serial No. 610,902. 5 Renewed July 11,1912. serial No. 708,934. i

cated inail the views of the drawings by `the fixed'jaw 6 and itsother-end reduced at 7 The handle is' preferably formed in twosections 9and 10, having openings therein and adapted 'to register withvcorresponding 'openings 11 formed in the reduced fendnof the shank toypermit the passage lof bolts or similar fastening devices 12.Theopposite longitudinal edges of the shank 5, are proing a slot 14.formed on. one 'edge of the shank and'intersecting the adjacentteetln-as shown. Slidably mounted on the shank 5,

:is agmo'vable jaw 15, the side Walls of which with teeth lor serrations13, there beare split longitudinally at 16 and provided with'xmpositelydisposed openings 17 communicating with the slot'l to form Telativelythin-spring arms 18. terminating .in enlarged heads The Yrear Wall ofthe movable jaw 15-is i.

providedfwith a transverserecess 20--commu'nicatingwith the bore 2l ofsaid jaw, so as .to expose the adjacentteeth .on the shank 4and also' toreduce the thicknessof the' arms 18, `thus permitting the latter toyield for the purpose hereinafter referred to.

the heads l5), isa` leverf22,having` oppositely disposed trunnions 23,which latterfit ineorrespondingly shaped openings formed-l.

in the heads 19. lf desired, however, a bolt or similar fastening devicemay be employed for connecting the lever to ,the spring arms 'instead ofthe trunnions.

4 The inner endof the lever 22 is provided With a'centrally .disposedrib 24 having a cam surface for 13 when said lever isinovcd to operativeand inoperative positions.'

The-,inner Wall of the bore 2l at the per end of the movable jawaiud at.the rear.

Piv'- yotally mounted between the inner faces-of,

of the wrench. is formed with transverse teeth or serrations 26 adaptedto engage the adjacent teeth 'on the rear longitudinal edge of theshank, while thewall of the bore at the front oi the movable jaw is`formed with similar teeth 27 for engagement with the teeth on the otherlongitudinal edge of 'the shank, said teeth 26 and 27 being disposed indifferent planes, as shown.

The lever 22 is preferably ot' less length than the movable jaiv15sothat When the lever is moved to operative posit-ion, said lever ivilllie wit-hin the recess 20 and thus not present any surface projection atthe rear face oli the Wrench. The tree end ot the iever 22 is preferablybifureated to form terminal lips 28, by means of which the lever may beconveniently grasped with the lingers andl disengaged from the teeth onthe shank. f

In operation, the lever 22 is sivung outwardly atsubstantially rightangles to the arms 18, which movement of the lever disengages the camtace 24 from the recess 14- so as to permit the movable jaw to be ad.-justed longitudinally ,of the shank and into engagement with a nut orother object. By moving the free end of the lever 22 in the direction ofthe shank, the cam tace of the rib 24 vwill bear against the Wall of therecess 14, thus moving the lower end of the movableV jaw laterally onthe shank and causing the teeth 26 and 27 to grip the adjacent, teeth onsaid shank and ettectually hold the movable jaw against accidentaldisplacement during the operation of the tool.

ItA Will here be noted. that the spring arms 18 not only-assist inholding the lever in operative position, but by reason of theirresilient properties, also serve to compensate for any' Wear on the camface of the rib 24 after the wrench has been used for `any length oftime. The spring arms 18 also permit the use of a larger cam4 anddispense with the employment of separate springs and auxiliary leverholdingr devices. lt will also be noted that' as the lever 22 is movedin the direction of the recess 20, the Walls. of the movable jaw at theSplit portion thereof will be slightly separated and thus exert anoutward pressure on thepivoted end of said lever, which pressure has atend.- eiicy to hold the free end ,of the lever Within the recess 20until manually released to effect a further adjustment of said movablejaw.

Having thus described the inventioi1,Wl1at is claimed as new is:

l. A Wrench includingashank,a movable jaw slidably mounted on t-he shankand provided with resilient arms, and a cam lever pivotally mounted onthe arms and adapted to engage said shank for holding the movwithtransverse teeth, a movable jaw split longitudinally to form spring armsslidably teeth, and a lever pivotally mounted on the arms and adapted toengage the shank for forcing the teeth on said movable jaw intoengagement with the teeth on the shank.

3. A .Wrench including a toothed shank, :i movable jaw slidably mountedon the shank and provided with oppositely disposed sets of teetharranged in different planes and adapted to'engage the teeth on theshank, said movable jaw being split longitudinally to ferm movable arms,and a lever pivotally mountedy on the arms of the movable jaiv andhaving a cam surface adapted to bear against the shank for holding themovable jaw in different positions of adjustment.

4L. A Wrench including a shank, a movable jaw slidably mounted on theshank and having its side Walls split longitudinally to form oppositelydisposed resilient arms, and a lever pivotally mounted on the free endsof said arms and movable into engagement with the shank for holding themovable jaw in dii'erent positions of longitudinal adjustment.

5. A Wrench including a shank having its opposite longitudinal edgesprovided with transverse teeth, there being a longitudinal recess formedin one edge of the shank and 9 intersecting the adjacent teeth, amovable jawslidably mounted on the shank and having teeth adapted toengage the-teeth on said shank, the side walls of the movable jaw beingsplit longitudinally to form oppositely disposed spring arms, and alever'- pivotally mounted between the spring arms and provided with arib having a cam surface adapted to bear against the wall of the recess.

6. A wrencliincluding a shank, a movable jaw slidably mounted on theshank and having its side walls split longitudinally and provided withopenings defining oppositiely disposed spring arms terminating inenlarged heads, and a lever pivotally mounted between the heads of thespring arms and provided with a cam face adapted to bear against theshank for holding the movable j aw in different positions oflongitudinal adjustment.

7. A wrench including a shank having a fixed jaw and provided withoppositely disposed transverse teeth, there being a longitudinal recess:termed in one side-of the shank and intersecting the adjacent teeth, amovable aw slidably mounted on said shank and having its side Walls atone end thereof split longitudinally to form oppositely disposed springai'ms, and a lever pivotally mounted between: the spring arms andprovided With a Ycentral rib having a cam face adapted to bear againstthe wall of the recess :tor clamping the movable jaw in differentposit-ions ofadjustment, the pivoted end of the lever on opposite sidesof the rib being curved so as t-o clear the adjacent teeth when saidlever is movedto operative position.

8. A. Wrench including a shank 'having a fixed jaw and provided at .itslongitudinal edges vvithv transverse teeth, there being a longitudinalrecess formed in one side of the shank and intersecting the adjacentteeth, a movable 'jaw having a longitudinal bore :for thereception ofthe shank, the opposite Walls of which bore are provided Wi'th teethadapt ed to engage the'teeth onsaid shank, the side Walls of the movablejaw being split longitudinally vfora portion of their length andprovided with openings defining oppositely disposed spring arms havingenlarged heads, there being a recess formed in one face of the movablejaw to exposel the adjacentteeth on the shank, and a lever having itsinner end pivotally mounted between the heads of the spring arms, thepivoted end of the lever being provided Witha cam face adapted to engagethe Wall of the longitudinal recess and having the material on each sideofthe rib cut-away to produce a curved surface, the vfree end of thelever being housed Within the recess in the rear face of the movable jawwhen said lever is in operative positio 9. A Wrench including a shank, amovable jaw slidably mountedon the shank and hav; ing its sidelongitudinally to form oppositely disposed spring arms, there being atransverse recess formed in the movable jaw, and a lever pivotallymounted between e spring arms and having a cam face adapted to bearagainst the shank for holding said mov-able jaw in dfferent positions oflongitudinal Iadjustment, said lever being housed Within the recess inthe movable jaw when the lever is in operar tive position.

In testimony whereof, I affix my signature in presence of two Witnesses.

BENJAMIN B. CALDWELL.

Witnesses:

A. J. GoGGANs, TL W. SHUFFLER,

Walls at one. end thereof split

